Varex Imaging has been granted a patent for an x-ray source that includes an anode, a field emitter, a first grid, a second grid, and a middle electrode. The second grid can be positioned between the first grid and the middle electrode or between the middle electrode and the anode, and it is a mesh grid. GlobalData’s report on Varex Imaging gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on Varex Imaging, Image segmentation techniques was a key innovation area identified from patents. Varex Imaging's grant share as of September 2023 was 64%. Grant share is based on the ratio of number of grants to total number of patents.

X-ray source with specific grid and electrode configuration

Source: United States Patent and Trademark Office (USPTO). Credit: Varex Imaging Corp

A recently granted patent (Publication Number: US11778717B2) describes an x-ray source with improved functionality and performance. The x-ray source includes an anode, a field emitter that generates an electron beam, a first grid that controls field emission from the field emitter, a second grid, and a middle electrode. The second grid is a mesh grid and is positioned either between the first grid and the middle electrode or between the middle electrode and the anode.

In one embodiment, the x-ray source includes multiple separate field emitters within a vacuum enclosure. A spacer is placed between the first grid and the anode, with the second grid positioned on the spacer. A voltage source applies different voltages to the first and second grids, which can be the same or different. The voltage source may also be a variable voltage source, allowing for adjustable voltage levels.

Additional features of the x-ray source include a third grid between the first grid and the anode, which can be independently controlled with a separate voltage. The spacer between the first grid and the anode may have multiple openings, with each opening aligned to a corresponding field emitter. The second and third grids can be positioned along different edges of the openings.

The x-ray source also allows for precise control of the electric field at multiple locations. The means for altering the electric field includes a mesh grid at one or more locations between the field emission control means and the x-ray generation means. This allows for improved performance and flexibility in generating x-rays.

Overall, this patent describes an x-ray source with various configurations and features that enhance its functionality and performance. The use of mesh grids, multiple field emitters, and adjustable voltage levels provide improved control and efficiency in generating x-rays. These advancements have the potential to benefit various applications in the field of x-ray technology.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.